Lithium chloride, or LiCl, is a chemical compound made up of lithium and chlorine. It appears as a white, hygroscopic solid that readily absorbs moisture from the air. LiCl is commonly used in various applications, including as a drying agent in chemical processes and in the production of lithium batteries. In addition to its industrial uses, LiCl has applications in medicine, particularly in treating certain mood disorders. It can help stabilize mood swings in patients with bipolar disorder. However, it must be used under medical supervision due to potential side effects and toxicity at high doses.